Ngo, A.;                     Cheng, K.-W.;                     Shang, C.;                     Huang, J.;                     Chaloupka, F.J.    
        Global Evidence on the Association between Cigarette Graphic Warning Labels and Cigarette Smoking Prevalence and Consumption. Int. J. Environ. Res. Public Health 2018, 15, 421.
    https://doi.org/10.3390/ijerph15030421
    AMA Style
    
                                Ngo A,                                 Cheng K-W,                                 Shang C,                                 Huang J,                                 Chaloupka FJ.        
                Global Evidence on the Association between Cigarette Graphic Warning Labels and Cigarette Smoking Prevalence and Consumption. International Journal of Environmental Research and Public Health. 2018; 15(3):421.
        https://doi.org/10.3390/ijerph15030421
    
    Chicago/Turabian Style
    
                                Ngo, Anh,                                 Kai-Wen Cheng,                                 Ce Shang,                                 Jidong Huang,                                 and Frank J. Chaloupka.        
                2018. "Global Evidence on the Association between Cigarette Graphic Warning Labels and Cigarette Smoking Prevalence and Consumption" International Journal of Environmental Research and Public Health 15, no. 3: 421.
        https://doi.org/10.3390/ijerph15030421
    
    APA Style
    
                                Ngo, A.,                                 Cheng, K.-W.,                                 Shang, C.,                                 Huang, J.,                                 & Chaloupka, F. J.        
        
        (2018). Global Evidence on the Association between Cigarette Graphic Warning Labels and Cigarette Smoking Prevalence and Consumption. International Journal of Environmental Research and Public Health, 15(3), 421.
        https://doi.org/10.3390/ijerph15030421